Hinge seat cutter



D NOV. 3, 1931. BRUUN 1,829,921'

HINGE SEAT CUTTER Filed June 23, 1930 2 Sheets-Sheet l 3, 1931. L. BRUU 1,829,921

HINGE SEATv CUTTER Filed June 23, 1930 2 Sheets-Sheet 2 Y Il 4 IllllnllllllllllllgllllwllhlllllwlllIlllellllllllllll Patented Nov. 3, 1931 UNITED STATES LARS BRUUN, OF DRAMMEN, ORWAY' HINGE SEAT ciJTTim Application filed June 23, 1930, Serial No. 463,241, vandin.Norway June 28, 1929. i

rIhe present invention relates to apparatus for chiseling of grooves, such as grooves for hinges on doors, windows and the like, by means of which apparatus the chiseling of the desired grooves may be made mechanically in a single operation.

The annexed drawings illustrate by way of example one embodiment of my apparatus.

Fig. 1 is a plan view of the apparatus, the top cover being removed.

Fig. 2 is a side view t-hereof. Fig. 3 shows a cross section along the line III-III in Fig. 1.

Fig. 4 shows a section along the line IV- IV in Fig. 1. Fig 5 shows a section along the line V-V in Fig. 1.

Fig. 6 is a similar diagrammatical view when two chisels are used, and

Fig. 7 is a view of a hinge situated in its groove.

At the drawing 1 is a supporting member or frame, here shown as a housing having a detachable cover 2. Below the supporting f member is arranged an electric motor 3, the shaft 4 of which extends into the supporting member and carries a pinion 5, preferably of raw hide or the like. At each side thereof the supporting member is provided with a handle 6.

Within the supporting member 1 are on studs 7 and 8 arranged toothed wheels 9 and 10 respectively, both of which mesh with the pinion 5. Parallel with the longitudinal axis of the supporting member 1 are arranged guides 11, 12 for the chisels 13, 14, which are V-shaped in section and arranged to be reciprocated longitudinally. Said chisels are kept into the said guides by means of memshape that the chisels will attain such position that their outer sides, as reckoned from the middle of the supporting member 1, stand at right angles to the plane of the supporting member.'

To each of the chisels 13, 14 is secured a' bers 15, 16. rlhe guides 11, 12 are of suchY 22 :situated excentrically one Aon 'each of the toothed wheels `9 and 10 respectively. The lugs vare 'so situated relatively `to each other that when one `chisel is moved in 'one direction theother chiselis .moved in the opposite 'Y direction.

The front ends ofthe'chisels '13, 14 extend outside of the :supporting member 1, and Kare guided by a member 23 (Figs. 1and`3`) fastened `to the supporting member and having co i grooves .into which the inner portions or leaves'of the chisels extend. The said member y23 `prevents the chisels 'from tensioning upwardly when in use.

At its front endthe supporting member `1 65.:

is provided with a dove-tail groove'24 which takes up andv guides a slide 27. Theslide 27 is provided with arms'26 and by means ofa screw 25 may be'adjusted at right angles to the chisels. Belowsaid arms isarranged-a support 28 provided with an opening 29 Yin which the front ends of the chisels 113,' 14 move; said support isattached to said arms in such manner 'that it may be adjusted relatively to the arms in the longitudinal direction of the chisels, and in order to facilitate such adjustment the arms 21 are provided with indications 30, as shown in Figs. 1 and 2.

By adjusting the slide with the arms 26 at right angles to the chisels 13, 14 the depth 80d entire apparatus more or less sideways during the grooving operation.

When for instance grooves are to be chiseled out in a door frame 31, the apparatus is placed as indicated in Fig. 2 with the support 28 against the rabbet of the door frame or an abutment for the door frame. When the motor 3 is started the chisels are reciprocated rapidly and cut out a groove,

length and depth of which is controlled by d the members 28 and 26 respectively. By moving the apparatus bodily at right angle to the longitudinal direction of the chisels 13, 14 the grove may be given the desired width.

The sides 33 (Fig. 6) of the groove are at l right angle to the surface of the frame 31 due to the positions of the ohisels.

F ig. 7 illustrates a hinge member secured in the groove.

It Will be understood that instead of the means here illustrated may be used excentric discs, cam discs or any other suitable mech* anism capable of imparting a rapid reciproeating movement to the chisels.

Having now particularly described and ascertained the nature of my said invention and in What manner the same is to be performed I declare that what I claim is:

1. A hinge seat cutter comprising a supporting member provided with handles, guides in the supporting member for tWo chisels of V-shaped cross section, said guides being so arranged that the outer branch of the V of each chisel stands at right angle to the plane of the supporting member, and means for imparting a rapid reciprocating movement to said chisels.

2. A hinge seat cutter according to claim l, in Which the supporting member supports an electric motor, the shaft of which by means of a pinion drives two reciprocating mechanisms, each connected with one of the chisels.

3. A hinge seat cutter according to claim l, in which the supporting member is provided with adjustable gauges comprising a slide, guides for said slide at the front end of the supporting member and means for adjusting said slide in said guides, arms con nected to said slide in right angle to the plane thereof, a support on said arms, and means for adjusting said support in the longitudinal direction of said arms.

In testimony whereof I affix my signature.

LABS BRUUN. 

